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I/86A Sydney Southern Star Catalogue (King+ 1983)
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Sydney Southern Star Catalogue
King D.S., Lomb N.R.
<J. Proc. R. Soc. N. S. W. 116, 53, (1983)>
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ADC_Keywords: Astrometric data; Positional data; Proper motions
Description:
This catalogue principally covers the range between -51deg. and
-63.5 deg and contains positions and proper motions for 29,926
stars. 3244 faint Astrographic stars were added to supplement the
stars at fainter magnitudes. Positions in standard form (hours,
minutes, and seconds of time for the right ascensions and degrees,
minutes, and seconds of arc for the declinations) have been added
to the machine readable version of this catalogue.
Introduction:
The Sydney Southern Star Catalogue contains the results of the
Sydney Observatory astrometric program during the two decades
ending in 1983. Declination zones centered on -53.5, 58.5, -56.0,
-58.5, -61.0, and -63.5 deg. have been measured and are included.
The plates were taken with a 23-cm Taylor, Taylor, and Hobson
camera and measured with a Grubb-Parsons photoelectric measuring
machine. The reference catalogue used was the WL50. The standard
error of a position based on four images is 0.10" in either
coordinate. A 2.3 magnitude diffraction grating was used to produce
side images shifted from the central image in declination.
The stars selected were compiled from the Cape Photographic
Catalogue for 1950 (CPC) (Jackson and Stoy 1954-1958),
International Reference Stars (IRS) (Scott 1962), Cape Zone
Cataloge for 1900 (ZC) (Gill and Hough 1923, Spencer Jones and
Jackson 1936), Albany General Catalogue (GC) (Boss 1937) and the
Sydney Astrographic Catalogue (AC) (Nangle and Wood 1925-1971). The
Sydney AC was used to obtain 3244 supplementary faint stars so that
about one star per square degree is in the photographic magnitude
range 11.0 to 11.5. All of the AC stars were given a magnitude of
12.0 to distinguish them as AC stars although they are presumed to
be in the stated photographic magnitude range. In the area south of
-63.5 deg., only the IRS stars were selected for measurement. This
was to give complete plate coverage for the determination of plate
constants for the plates centered at -6358.5 deg. 395 IRS stars are
included in this zone. CPC stars and AC stars were selected for
measurement between declinations -52deg. and -63.5 deg. Between
-51deg. and -52deg., the measuring list was prepared by
supplementing the few CPC stars in this area with ZC stars, GC
stars, and IRS stars. In general, stars brighter than photographic
magnitude 6.0 were excluded and stars brighter than photographic
magnitude 8.1 had their first order side images measured as well as
the central image, giving three measurements.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
primary.dat 62 23287 Positions and proper motions for 23287 stars
faint.dat 52 3244 Positions, only, for 3244 faint stars
south.dat 52 395 Positions, only, for 395 stars south of
declination -63.5 deg.
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Three files comprise the Sydney Southern Star Catalogue. The
format of the three files is identical except that only file 1
contains proper motions. If any datum is missing, the corresponding
field will be blank. Although an I or an F format may be given as
an alternate, an A format may be necessary to distinguish between a
blank and a zero.
Byte-by-byte Description of file: primary.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- num Number
7- 10 I4 0.01mag magpg Photographic magnitude
11- 12 I2 h RAh Hours right ascension (1950)
13- 14 I2 min RAm Minutes right ascension (1950)
15- 20 F6.3 s RAs Seconds right ascension (1950)
21 A1 --- DE- Sign of declination
22- 23 I2 deg DEd Degrees declination (1950)
24- 25 I2 arcmin DEm Minutes declination (1950)
26- 30 F5.2 arcsec DEs Seconds declination (1950)
31- 38 I8 0.001s RAsec Right ascension in seconds
39- 46 I8 0.01arcsec DEsec Declination in arcseconds
47- 51 I5 0.001yr Epoch Epoch - 1900.000
52 I1 --- N No. observations
53- 57 I5 0.0001s/yr pmRA Proper motion in right ascen.
58- 62 I5 0.001arcsec/yr pmDE Proper motion in declination
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Byte-by-byte Description of file: faint.dat, south.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- num Number
7- 10 I4 0.01mag magpg Photographic magnitude
11- 12 I2 h RAh *Hours right ascension (1950)
13- 14 I2 min RAm Minutes right ascension (1950)
15- 20 F6.3 s RAs Seconds right ascension (1950)
21 A1 --- DE- Sign of declination
22- 23 I2 deg DEd Degrees declination (1950)
24- 25 I2 arcmin DEm Minutes declination (1950)
26- 30 F5.2 arcsec DEs Seconds declination (1950)
31- 38 I8 0.001s RAsec Right ascension in seconds
39- 46 I8 0.01arcsec DEsec Declination in arcseconds
47- 51 I5 0.001yr Epoch Epoch - 1900.000
52 I1 --- N No. observations
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Note on RAh:
The positions are for the equinox B1950 and the reference system
used was Washington El Leoncito 50.
Additional Information:
Construction of the current version of the Sydney Southern Star
Catalogue The machine-readable file was received on magnetic tape
from Dr. N. R. Lomb of the Sydney Observatory in November, 1983 in
excellent shape. As received, the catalogue contained two files.
The primary catalogue file contained right ascensions and
declinations in milliseconds of time and hundreths of a second of
arc, respectively. The second file contained the data for both the
faint Astrographic stars and the southern IRS stars. In the present
version, sexigesimal positions (hours and degrees) have been added
in addition to the form given on the tape as received and the
Astrographic and IRS data have been divided into separate files.
Acknowledgments:
We thank Dr. Lomb for supplying us with the machine-readable
version of the Sydney Southern Star Catalogue and for a preprint of
the Source Reference.
References:
Boss, B. 1937, General Catalogue of 33,342 Stars for the Epoch
1950, vols. 2-5. Carnegie Inst. Washington, Publ. 468
Gill, D., and Hough, S. S. 1923, Zone Catalogue of 20,843 stars,
1900, R. Obs. Cape of Good Hope
Jackson, J., and Stoy, R. H. 1954-1958, Ann. Cape Obs. 19-20
King, D. S. and Lomb, N. R. 1983, J. Proc. R. Soc. N. S. W. 116, 53
(Sydney Obs. Papers No. 96)
Nangle, J., and Wood, H. W. 1925-1971, Astrographic Catalogue
1900.0, Sydney Section 1-53
Scott, F. P. 1962, AJ, 67, 690
Spencer Jones, H., and Jackson, J. 1936, Proper motions of Stars in
the Zone Catalogue of 20,843 Stars, 1900, Roy. Obs. Cape of Good
Hope (London, H. M. Stationery Office)
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(End) Nancy G. Roman [SSDOO/ADC] (28-Mar-1995)